Skip to content
  • Paul E. McKenney's avatar
    rcu: Add call_rcu_tasks() · 8315f422
    Paul E. McKenney authored
    
    
    This commit adds a new RCU-tasks flavor of RCU, which provides
    call_rcu_tasks().  This RCU flavor's quiescent states are voluntary
    context switch (not preemption!) and userspace execution (not the idle
    loop -- use some sort of schedule_on_each_cpu() if you need to handle the
    idle tasks.  Note that unlike other RCU flavors, these quiescent states
    occur in tasks, not necessarily CPUs.  Includes fixes from Steven Rostedt.
    
    This RCU flavor is assumed to have very infrequent latency-tolerant
    updaters.  This assumption permits significant simplifications, including
    a single global callback list protected by a single global lock, along
    with a single task-private linked list containing all tasks that have not
    yet passed through a quiescent state.  If experience shows this assumption
    to be incorrect, the required additional complexity will be added.
    
    Suggested-by: default avatarSteven Rostedt <rostedt@goodmis.org>
    Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
    8315f422